227 results about "Heat cycling" patented technology

The invention belongs to the technical field of solid oxide batteries, and discloses a nickel-iron support body of a metal-supported solid oxide battery, a total battery and a preparation method. The nickel-iron supporting body of the metal-supported solid oxide battery is made of a nickel-iron alloy material in a reducing atmosphere, a gradient pore structure with gradient pore distribution is prepared and formed through a double-layer casting phase inversion process, and the gradient pore structure is a composite structure comprising a finger-shaped pore channel layer and a skin layer. Compared with a ceramic material, the composite material has higher mechanical strength and thermal conductivity, can better bear thermal shock and mechanical stress, is particularly suitable for high-temperature and rapid thermal cycle working environments, and can keep good structural stability under the rapid heating condition of 50 DEG C / min.

The invention discloses a composite conductive filler, a shielding material and a cable, the composite conductive filler comprises the following raw materials: conductive carbon black, carbon nanotubes and liquid metal, and the mass ratio of the conductive carbon black to the carbon nanotubes to the liquid metal is (80-90): (1-15): (1-12). The composite conductive filler provided by the invention has a ternary synergistic efficient conductive network structure, the contact resistance between the conductive fillers is remarkably reduced, the melt index of the composite conductive filler is greatly improved, meanwhile, micropores of the material can be filled at high temperature, the thermal cycle aging property of the material is remarkably reduced, and the service life of the material is prolonged. The integration of a high-stability conductive network, good processing fluidity and excellent interface thermal mechanical performance is realized. The key technical problem that conductivity, processability and long-term stability of a high-voltage cable semi-conductive shielding material are difficult to consider at the same time is solved, and particularly, the high-voltage cable semi-conductive shielding material can be applied to ultra-high voltage scenes of 110 kV and above.

The invention discloses a welding slag ladle for containing copper slag and a design method. The welding slag ladle is suitable for containing, cooling and inverted placing procedures of high-temperature copper slag. The cinder ladle comprises a cylinder body, a ladle bottom, rib plates, trunnions and supporting legs, the cylinder body and the ladle bottom are formed by welding high-temperature-resistant and high-strength rolled plates, the thickness of the cylinder body is 70-100 mm, and the thickness of the ladle bottom is 80-120 mm; setting an inclination angle beta of 11.5-21 degrees relative to the center line of the bus of the cylinder body, and controlling the roughness of the inner wall to be less than or equal to 12.5 microns so as to reduce the separation resistance after the copper slag is cooled; thickness combination, stress distribution, deformation and rib plate arrangement are optimized through structural mechanical simulation, and it is ensured that the structural strength meets the requirements under high temperature and thermal cycle loads; full penetration weld joints are adopted, nondestructive testing is carried out, and the welding reliability is guaranteed; compared with a traditional casting cinder ladle, the mass of the cinder ladle is reduced by 10%-15%, the deslagging efficiency is improved, the service life is prolonged to more than two times of the original service life, and the cinder ladle has the advantages of being light in structure, high in bearing capacity, high in deformation resistance and good in maintainability.

The invention discloses a silicon carbide power module packaging structure with low thermal resistance and low stress, and belongs to the technical field of semiconductor devices. The packaging structure comprises a metal substrate; the insulating ceramic layer is arranged on the metal substrate; the circuit layer is arranged on the insulating ceramic layer; the lower surface of the silicon carbide chip is connected with the circuit layer through a first interface layer; the composite heat dissipation stress buffer layer is arranged on the upper surface of the silicon carbide chip through a second interface layer; the copper clamp is connected with the upper surface of the composite heat dissipation stress buffer layer through a third interface layer; and the composite heat dissipation stress buffer layer is made of a copper-graphite composite material. According to the invention, the junction temperature of the silicon carbide chip can be greatly reduced, the overall thermal resistance is reduced, the surface stress of the chip is reduced, the warping phenomenon of the chip in the working process is effectively improved, and the long-life reliability of the power module under the long-term thermal cycle working condition is ensured.

The invention discloses a heat pump cold and hot cycle control system based on an intelligent AI, and relates to the technical field of heat pump control, and the system comprises a heat pump system digital twinborn body module which obtains the historical operation data of a heat pump, analyzes the multi-dimensional characteristics of the heat pump under a specific working condition, couples a heat pump mechanism model, and builds a virtual simulation heat pump digital twinborn body; the dynamic load prediction curve module is used for acquiring real-time operation data of the heat pump, introducing an environmental factor as an external dynamic disturbance variable and generating a dynamic load prediction curve of the heat pump; the heat pump system optimal operation mode module is used for generating a user personality portrait, integrating a heat pump load prediction curve, real-time electricity price information and an equipment health state evaluation index, and substituting the user personality portrait, the heat pump load prediction curve, the real-time electricity price information and the equipment health state evaluation index into the virtual simulation heat pump digital twin body to obtain a heat pump optimal operation mode; and the global optimal control instruction set module is used for generating a heat pump global optimal control instruction set by taking the heat pump comprehensive energy efficiency ratio and the user comfort as collaborative optimization targets and utilizing a multi-target decision algorithm. The comprehensive energy efficiency of the system is improved.

The invention relates to the technical field of metal surface coating preparation, in particular to a high-temperature thermal cycle impact resistant yttrium oxide composite coating on the surface of refractory metal and a preparation method of the yttrium oxide composite coating. The refractory metal composite coating material is composed of a refractory metal matrix and a coating. The coating comprises a bonding layer, a middle layer and a surface layer which are arranged in a contact manner; the bonding layer is composed of the refractory metal and yttrium oxide, and the porosity of the bonding layer is 1%-5%; the middle layer is a pure yttrium oxide layer with the porosity of 5%-10%; the porosity of the surface layer is 1t; 2% of a pure yttrium oxide layer; the melting point of the refractory metal is 2470 DEG C or higher. According to the refractory metal composite coating material and the preparation method and application thereof, the refractory metal coating structure is optimized, the porosity of the coating is further adjusted, the high-temperature molten metal corrosion resistance and the high-temperature thermal shock resistance of the coating are improved, meanwhile, the bonding strength between the coatings is guaranteed, and the service life of the coating is prolonged. The method is expected to be applied to high-melting-point metal smelting equipment.

To provide a working medium for heat cycle which has less influence over the ozone layer, which has less influence over global warming and which provides a heat cycle system excellent in the cycle performance (the efficiency and the capacity), and a heat cycle system excellent in the cycle performance (the efficiency and the capacity). A working medium for heat cycle comprising 1,2-difluoroethylene is employed for a heat cycle system (such as a Rankine cycle system, a heat pump cycle system, a refrigerating cycle system 10 or a heat transport system).

The invention belongs to the technical field of aluminum-based composite materials, and particularly relates to a heat-resistant cyclic wear-resistant aluminum-based composite material and a preparation method thereof.Based on the total mass of the aluminum-based composite material, the heat-resistant cyclic wear-resistant aluminum-based composite material comprises an aluminum alloy matrix and a SiC particle reinforcement with the mass fraction of 15%-25%, and the SiC particle reinforcement is a mixture of micron-sized particles and submicron-sized particles; the particle size of the micron-sized particles is 10-100 [mu] m, the particle size of the submicron-sized particles is 0.3-0.8 [mu] m, the addition amount of the submicron-sized particles accounts for 0.1-2% of the total mass of the composite material, and the composite material has good wear resistance and good heat-resistant cycle performance at the normal temperature of minus 300 DEG C. The prepared SiC particle aluminum-based composite material brake disc can avoid excessive decline of material hardness, wear resistance and friction coefficient caused by thermal cycle in a repeated braking process.

The invention relates to the technical field of metal material strengthening treatment, in particular to a micropitting-resistant wind driven generator gear carburizing and quenching composite strengthening process which comprises the following steps: S1, gear blank pretreatment and surface activation; s2, gradient carburizing strengthening treatment; s3, grain refinement annealing treatment; s4, step quenching strengthening treatment; s5, performing deep cooling and thermal cycle treatment; s6, directional tempering regulation and control treatment; s7, composite shot peening strengthening treatment is conducted; and S8, an antifriction composite film layer is deposited on the surface of the gear subjected to shot peening strengthening in the S7. According to the method, through a synergistic strengthening mechanism of gradient carburization, step quenching, structure regulation and control and surface functionalization, the residual stress distribution and tribological performance are optimized while the high surface hardness of the gear is kept, and the technical problems that in a traditional technology, the carburized layer is concentrated in stress, uneven in structure, single in surface performance and the like are solved.

A working medium including (E)-1,3,3,3-tetrafluoropropene, (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and 1,1,1,2,3,3,3-heptafluoropropane, in which a content of the 1,1,1,2,3,3,3-heptafluoropropane is 8.9% by mass or less with respect to a total content of the (E)-1,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2,3,3,3-heptafluoropropane, and a content of the (Z)-1-chloro-2,3,3,3-tetrafluoropropene is 24.5% by mass or less with respect to the total content, as well as any application of the working medium.

The invention discloses a method for generating a metal 3D printing supporting structure, and relates to the technical field of additive manufacturing. The method comprises the steps that geometric analysis is conducted on a three-dimensional model of a to-be-printed part, and areas needing to be supported are recognized and classified into a strong supporting area, a weak supporting area and a transition supporting area; different laser scanning parameters are configured for different supporting areas, a supporting main body adopts low-energy density parameters to form a porous structure, a contact interface adopts discrete dot matrix scanning to form weak connection, and a transition layer with gradually-changed parameters is arranged between the supporting main body and the contact interface; a composite supporting structure composed of hexagonal honeycomb units and vertical thin walls is generated; in the printing process, high-frequency micro-vibration is applied to the support to improve powder fluidity, and sweep-frequency vibration is applied to the interface layer to weaken interface bonding; thermal cycle treatment is carried out after printing, and interface automatic cracking is achieved through the difference of thermal expansion coefficients; and finally, support falling is accelerated through resonance frequency vibration. Through the synergistic effect of the scanning parameter gradient, the structure optimization design and the vibration auxiliary technology, the removability of the support is remarkably improved, the material consumption is reduced, and the surface quality of the part is improved.

The invention discloses a double-ceramic-layer thermal barrier coating of a differentiated columnar crystal structure and a preparation method, and belongs to the technical field of thermal barrier coating corrosion and protection. The invention innovatively discovers and utilizes the double influence of the columnar crystal size on the performance of the coating; the YSZ layer adopts a fine grain structure of 1-1.5 microns, so that the bonding strength and thermal shock resistance of the coating can be obviously improved; and the modified gadolinium zirconate layer adopts a 2-3 [mu] m coarse grain structure, so that the heat conductivity can be reduced, the permeation path of CMAS along a grain boundary can be effectively inhibited, and meanwhile, the modified gadolinium zirconate layer reacts with CMAS to form a compact barrier layer to prevent further permeation of CMAS. Through accurate regulation and control of electron beam physical vapor deposition (EB-PVD) process parameters, differential control of the sizes of the two layers of ceramic columnar crystals is realized, and under the synergistic effect of the two columnar crystal structures with different sizes, the thermal cycle life and CMAS corrosion resistance of the whole coating system in an ultra-high-temperature environment are remarkably prolonged and improved.

The invention discloses intelligent temperature control composite material roller heat treatment integrated equipment, and relates to the technical field of roller heat treatment. Comprising an equipment bottom plate, a heat treatment box is fixedly installed on the equipment bottom plate, a hydraulic cylinder is fixedly installed on the heat treatment box, a box door is fixedly installed on an output shaft of the hydraulic cylinder, the box door and the equipment bottom plate are installed in a sliding mode, an auxiliary assembly is arranged on the heat treatment box, and a heater is arranged on the auxiliary assembly. The heater is located in the heat treatment box; an adjusting assembly is arranged on the box door, and a clamping plate is arranged on the adjusting assembly; and a heat circulation assembly is arranged on the heat treatment box. Through cooperative use of the auxiliary assembly, the adjusting assembly and the heat circulation assembly, it is ensured that a roller can be evenly heated in the heat treatment box, the heat treatment efficiency is improved through circulation of hot air flowing, and the use effect of the equipment is greatly improved.

This invention proposes a multilayer circuit structure and its fabrication method. The multilayer circuit structure includes a substrate and integrated circuits disposed on both sides of the substrate. Each integrated circuit includes a flexible insulating layer and two flexible conductive layers disposed on both sides of the flexible insulating layer. Each flexible conductive layer has a rough surface and a smooth surface, with each rough surface in contact with the flexible insulating layer. One side of the flexible conductive layer has a rough surface that contacts the flexible insulating layer, significantly increasing the contact area and improving the adhesion between the flexible conductive layer and the flexible insulating layer. This design helps reduce the risk of delamination and peeling, enhances the mechanical stability of the circuit structure, and maintains stable performance, especially when subjected to thermal cycling and mechanical stress during manufacturing. The multilayer circuit structure uses a material with a certain degree of flexibility, enabling it to withstand stress from mechanical operations during manufacturing. The combination of these two factors improves the manufacturing yield of the multilayer circuit structure.

The invention discloses a spaceflight structure strength analysis method based on a multi-physics field, which comprises the following steps: establishing a parameterized finite element model integrated with a friction heat generation effect by acquiring in-orbit temperature time sequence data and material creep characteristic parameters, and simulating inelastic strain accumulation of a structure under a thermal cycle load; a nonlinear damage model considering a creep-fatigue interaction effect is adopted to calculate an accumulated damage degree, an effective stiffness matrix is constructed to deduce a structure inherent frequency drift distance and a shape retention capability parameter, and finally, through a safety margin evaluation algorithm, the effective strength of a material and the maximum equivalent stress of the structure are dynamically compared, so that the performance of the material is evaluated. And accurate prediction of quantitative residual strength and safe service life is realized. According to the method, the technical problems that the local thermal coupling effect is not depicted enough and the creep fatigue nonlinear interaction effect is ignored are solved, and the precision and reliability of on-orbit performance degradation prediction of the spaceflight flexible structure are remarkably improved.

The utility model relates to a centralized hair removal device of a continuous anti-pilling machine, which comprises a box body internally provided with an anti-pilling cylinder. The hair removal assembly comprises an inclined mounting plate, a scraper device I is arranged above the inclined mounting plate, a dust removal pipe is mounted at the end, close to the bottom of the box body, of the inclined mounting plate, the outlet end of the dust removal pipe extends out of the box body, and a pneumatic air door I is mounted at the outlet end of the dust removal pipe; the heat circulation assembly comprises a fan installed at the top of the box body, a heat exchanger is installed on the outer wall of an air outlet of the fan, an air channel I communicated with the interior of the top of the box body is installed at the air outlet of the fan, an air channel II is installed at an air inlet of the fan, and an air outlet pipe is installed at the other end of the air channel II. A pneumatic air door II is mounted at the outlet end of the air outlet pipe; through the built-in hair removal assembly, automatic cleaning of waste hair deposited below the polar fleece cylinder and waste hair attached to the filter screen before hot air circulation is achieved, the burden of manual cleaning is greatly relieved, and the production efficiency is improved.

The teachings herein are directed to multi-layered articles, methods for making the multi-layered articles, and polymeric compositions for the multi-layered articles. The multi-layered article includes a substrate layer and an overmolded cover layer. The substrate layer preferably is a polymeric composition including about 55 weight percent or less (preferably about 50 weight percent or less) polycarbonate, a styrene containing polymer, and an impact modifier. The cover layer preferably includes a polyurethane, a polyurea, or both. The substrate preferably forms a durable bond to the cover layer that maintains adhesion even after aging (e.g., heat, thermal cycling, UV light, visible light, humidity, climate aging, or any combination thereof).

The utility model discloses a single-layer penetrating type up-and-down hot circulating air tunnel dryer, which belongs to the field of drying and comprises a drying chamber, a conveying screen is arranged in the drying chamber, and the width of the conveying screen is slightly smaller than that of the drying chamber. A uniform material distribution device is arranged at the position, close to an inlet of the drying chamber, of the conveying screen, and the uniform material distribution device can uniformly arrange materials on the conveying screen; the drying chamber is sequentially provided with a plurality of upper air blowing chambers and a lower air blowing chamber in the conveying direction of the conveying screen, air blowing openings of the upper air blowing chambers are formed below the conveying screen, and air blowing openings of the lower air blowing chambers are formed above the conveying screen. By means of the structure, the drying effect of materials on the conveying screen can be improved, and energy consumption is reduced.

The present invention provides solder alloys, solder pastes, solder balls, solder preforms, and solder joints that have excellent resistance to drop impact and heat cycling, suppress the occurrence of chipping, bridging, and icicle formation, and also suppress the occurrence of electromigration. [Solution] The solder alloy has an alloy composition consisting of, by mass%, Ag: 0.3~1.9%, Cu: 0.40~1.00%, Bi: 0.5~4.9%, P: 0.00100~0.02000%, and the remainder being Sn. The alloy composition may further contain Ge, Co, and Ga in amounts of 0.06% or less by mass, and at least one of each. The alloy composition may also further contain As, In, Zr, Mn, Ti, Zn, Fe, Al, Ni, Au, Mg, Cr, and Pt in amounts of 0.06% or less by mass, and at least one of each.

The invention discloses a manufacturing method of an optical waveguide substrate and the optical waveguide substrate, and the manufacturing method of the optical waveguide substrate comprises the steps: preparing a glass substrate, and manufacturing an electrical transmission channel on the glass substrate; manufacturing an optical waveguide structure on the glass substrate; manufacturing a 90-degree coupling reflection air lens; and assembling the optical chip end electrical assembly and the photoelectric detector end electrical assembly on the glass substrate. Therefore, the electrical transmission channel and the optical waveguide structure are integrated on the glass substrate, and the optical chip end electrical assembly and the photoelectric detector end electrical assembly are assembled on the glass substrate through the 90-degree coupling reflection air lens. In this way, the overall structure composed of the glass substrate and the silicon chip can be prevented from warping, deforming or sinking in the thermal cycle process, the stability of the optical waveguide substrate is improved, the transmission loss of optical signals can be reduced, delay in the optical signal transmission process is reduced, no electromagnetic coupling exists in the optical signal transmission process, and the optical signal transmission efficiency is improved. The crosstalk problem caused by electromagnetic coupling can be avoided.

Methods and apparatus for protecting parts of a process chamber from thermal cycling effects of deposited material. In some embodiments, a method of protecting parts of a process chamber includes the steps of wet etching the parts using a weak base or weak acid; cleaning the parts by sandblasting; coating at least a portion of a surface of the parts using a stress release layer. The stress release layer forms a continuous layer of about 50 microns to about 250 microns thick and is configured to maintain structural integrity of the parts from thermal cycling of aluminum deposited on the parts. The method also includes wet cleaning the parts after forming the stress release layer using a heated deionized water rinse.

The utility model discloses a photovoltaic photo-thermal two-stage heat pump system which comprises a photovoltaic photo-thermal system, a first-stage heat pump system, a buffer water tank system and a second-stage heat pump system, an outlet of a heat collector refrigerant pipe of the photovoltaic photo-thermal system is divided into two paths, one path is connected with an inlet in one side of a first-stage evaporator through a first pipeline, and the other path is connected with an outlet in the other side of a second-stage evaporator through a second pipeline. An outlet in one side of the first-stage evaporator is connected to a refrigerant inlet of the heat collector through a fourth valve; the other path is connected to a first path inlet of the second-stage evaporator through a first pipeline, and a first path outlet of the second-stage evaporator is connected with a refrigerant inlet of the heat collector; the first-stage heat pump system comprises a first-stage heat pump heating circulating system and a first-stage heat pump refrigerating circulating system. According to the utility model, the heat pump can be utilized to take away the power generation waste heat of the photovoltaic module in time, and the phenomenon of power generation efficiency reduction caused by overhigh temperature of the photovoltaic module is relieved; the evaporation temperature of the heat pump can be increased through solar energy, the thermal performance of the system is improved, and therefore advantage complementation and gradient utilization of clean energy are achieved.

The application discloses a kind of data-driven power distribution methods and systems for H bridge module health degree balance. It belongs to the technical field of power system automation. The steps are as follows: first, based on current, voltage and switch state, a thermoelectric coupling model of IGBT and capacitor is constructed to estimate dynamic temperature; Then introduce sliding window and extreme pairing mechanism, extract the thermal cycle load sequence of key devices; Then, combined with Coffin-Manson and Arrhenius model, the life damage is calculated; Normalize and time decay processing to construct module health index. On this basis, a power optimization allocation model with health awareness is constructed, TD3 reinforcement learning algorithm is introduced to realize strategy training and online deployment, forming a closed-loop control mechanism from state perception, decision optimization to scheduling execution. This method provides an intelligent and adaptive scheduling solution for multi-module energy storage systems, improving the intelligent level of system health management.

A copper-ceramic bonded body obtained by bonding a copper member having a Cu content of 99.96% by mass or more and a ceramic member, the copper-ceramic bonded body having a Cu content of 99.96% by mass or more, after a thermal cycle test in which 3000 cycles are performed as one cycle by holding the copper member at-65 DEG C for 5 minutes and holding the copper member at 150 DEG C for 5 minutes in a liquid bath, the copper-ceramic bonded body having a Cu content of 99.96% by mass or more and a ceramic member having a Cu content of 99.96% by mass or more. The average crystal grain size in a cross section in the thickness direction of the copper member is 100 [mu] m or less.

The invention relates to the technical field of greenhouses, in particular to a thermal circulation ventilation wall body for a seedling greenhouse, which comprises a plurality of ventilation wall body modules, the plurality of ventilation wall body modules are spliced to form the thermal circulation ventilation wall body of the seedling greenhouse, and the outer side of each ventilation wall body module is fixedly provided with an outer layer protection plate through bolts; a light reflecting groove is formed in the side, close to the outer layer protection plate, of the interior of the ventilation wall body module, and a plurality of light reflecting strips are rotationally arranged in the light reflecting groove. Through organic combination of light condensation, heat storage and cooling and heating bidirectional regulation and control, a light condensation heat storage mode or a light-shielding cooling mode can be flexibly switched according to seasonal changes, and dynamic balance of the temperature in the greenhouse can be achieved without depending on additional heating and cooling equipment; through the optimal design of the heat storage structure and the heat exchange assembly, the heat exchange efficiency is improved, the problem of overlarge temperature fluctuation is effectively avoided, meanwhile, efficient utilization of clean energy such as solar energy is achieved, energy consumption is reduced, and the sustainable development concept is met.

This invention relates to high-energy-density phase change composite materials, their preparation methods, and applications, belonging to the field of phase change composite material technology. To address the problems of low energy density, insufficient mechanical properties, and poor processability of current phase change materials, this invention provides a high-energy-density phase change composite material, specifically a lightweight porous cellulose phase change composite aerogel. Internally, it consists of a three-dimensional network framework formed by the cross-linking of vinyl-functionalized cellulose nanocrystals and cellulose nanofibers. The phase change material is uniformly loaded within the pores of this three-dimensional network, with a loading amount of 65.53~91.02 wt%. The phase change temperature range of the composite material is 20~80℃. This invention's phase change composite material, relying on a hierarchical confinement structure, achieves efficient encapsulation and high loading of the phase change material, with a phase change enthalpy as high as 133.2 J / g. It also possesses excellent mechanical and thermal cycling stability and 3D printing performance, making it suitable for scenarios with wide temperature fluctuations and applicable to the field of intelligent thermal management.

Systems and apparatus for a reduced mass substrate support are disclosed, according to certain embodiments. A front side pocket is provided for support of a substrate, while a backside pocket is provided that reduces the mass of the substrate support. By providing the backside pocket, the mass of the overall substrate support is reduced, providing faster thermal cycling times for the substrate support and reducing the weight of the substrate support for transport. Lift pin systems, according to disclosed embodiments, are compatible with existing pedestal systems by providing a hollow extension from each lift pin hole that extends from a bottom of the backside pocket to provide support for lift pin insertion and operation.

Provided is a thermal cycling system including: a working medium; a compressor; a condenser; a pressure reducing device; and an evaporator, in which the working medium includes HFO-1123, HFO-1234yf, and R290, in a case in which a content of the R290 is defined as A mass % and a content of the HFO-1123 is defined as B mass %, the A and the B satisfy Equation (1) and Equation (2) below, a total content of the HFO-1123, the HFO-1234yf, the R290 is 99.0 mass % or more with respect to a total amount of the working medium, the evaporator is controlled such that an evaporation temperature of the working medium is −45° C. or higher, Equation (1) is −1.6433×A+38.1000≤B≤0.0136×A2−0.8364×A+61.0167, and Equation (2) is 2.0≤A≤9.0.